Fixed bug in Grass tokenizer - in some situations it would not separate two tokens if string appeared immediately after the other token
Removed unneded (commented) code from Grass tokenizer
Translator catches more syntax errors which were before passing
translation stage but then gave unexpected results in compiled source
Translator now does better job at function call validation
Translator should now catch most common function-call related errors
Unified two elif's into one (without readablility loss_